Factor Xa Inhibitor

Warfarin is an anticoagulant that acts by inhibiting the enzyme that recycles vitamin K from its oxidized form resulting in active vitamin K depletion.

Rivaroxaban (Xarelto, Janssen/Bayer) is a direct factor Xa inhibitor used orally in the prevention of thromboembolism in the setting of atrial fibrillation or atrial flutter.